8115 parallel zfs mount

*** 9,18 ****
--- 9,19 ----
   * http://www.illumos.org/license/CDDL.
   */
  
  /*
   * Copyright 2013 Nexenta Systems, Inc.  All rights reserved.
+  * Copyright 2017 RackTop Systems.
   */
  
  /*
   * mutex(9f)
   */
*** 49,59 ****
  {
          mp->m_owner = _KTHREAD_INVALID;
  }
  
  void
! mutex_enter(kmutex_t *mp)
  {
          VERIFY(0 == _lwp_mutex_lock(&mp->m_lock));
          mp->m_owner = _curthread();
  }
  
--- 50,60 ----
  {
          mp->m_owner = _KTHREAD_INVALID;
  }
  
  void
! kmutex_enter(kmutex_t *mp)
  {
          VERIFY(0 == _lwp_mutex_lock(&mp->m_lock));
          mp->m_owner = _curthread();
  }
  
*** 69,79 ****
          }
          return (0);
  }
  
  void
! mutex_exit(kmutex_t *mp)
  {
          ASSERT(mp->m_owner == _curthread());
          mp->m_owner = _KTHREAD_INVALID;
          (void) _lwp_mutex_unlock(&mp->m_lock);
  }
--- 70,80 ----
          }
          return (0);
  }
  
  void
! kmutex_exit(kmutex_t *mp)
  {
          ASSERT(mp->m_owner == _curthread());
          mp->m_owner = _KTHREAD_INVALID;
          (void) _lwp_mutex_unlock(&mp->m_lock);
  }